120021010121 has 2 divisors, whose sum is σ = 120021010122. Its totient is φ = 120021010120.

The previous prime is 120021010103. The next prime is 120021010163. The reversal of 120021010121 is 121010120021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116870994496 + 3150015625 = 341864^2 + 56125^2 .

It is a cyclic number.

It is not a de Polignac number, because 120021010121 - 2¹⁴ = 120020993737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (120021012121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010505060 + 60010505061.

It is an arithmetic number, because the mean of its divisors is an integer number (60010505061).

Almost surely, 2^120021010121 is an apocalyptic number.

It is an amenable number.

120021010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021010121 is an equidigital number, since it uses as much as digits as its factorization.

120021010121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 120021010121 its reverse (121010120021), we get a palindrome (241031130142).

The spelling of 120021010121 in words is "one hundred twenty billion, twenty-one million, ten thousand, one hundred twenty-one".